Accessories & Options

Pro-User Diamant rack adapted for tandem

€479,00

The Pro-User Diamant is the ideal foldable bike carrier that perfectly accommodates the foldable STÆRK tandem. The carrier is delivered already customized for the tandem, so you won't need to make any adjustments yourself, perhaps just some minor tweaks to the slots.

E10-Air adjustable seatpost

Additional €100,00

Instead of the regular seat post, STÆRK offers the option to install an E10 Air-adjustable seat post. With this seat post, adjusting the height is similar to adjusting an office chair by operating a lever. This is ideal when multiple individuals use the tandem bike. Please note that this seat post does not have suspension.

Diagonally Suspending Seatpost

Additional €80,00

For users who prioritize comfort, STÆRK offers a suspension seat post that tilts backward towards the wheel instead of directly towards the bottom bracket, as is the case with most seat posts. This design allows the seat post to absorb shocks and bumps from the direction where discomfort originates, providing unparalleled comfort to the biking experience.

Quick Release

Additional €12,50 per unit

Sometimes it's convenient to easily adjust the seat post to a higher or lower position. Especially for different riders or when disassembling the seat posts or the tandem handlebars for transport. By default, your STÆRK comes equipped with clamps that require loosening with an Allen key. As an alternative, you can choose quick-release levers for both the front and rear seat posts, as well as for the rear rider's handlebar stem. This provides a more convenient and tool-free adjustment solution.

ENDUO Super Strong Chain

Additional €600,-

This super-strong chain runs smoother and lasts up to 8 times longer.

Magnetic closing mechanism

Additional price around €49,00

At times, it's convenient to leave your STÆRK in the folded position. To prevent it from unfolding inadvertently, a magnetic closure has been developed. This feature is convenient during transport, in bike storage areas, or in your own storage.

Contact Plus 42mm Tyres

Additional €25,00

By default, the STÆRK comes with Continental Contact tires. These tires are known for their smooth rolling and excellent puncture resistance. For riders who desire even greater assurance, there is the option to choose the Continental Contact PLUS tires with Hermetic Plus inner tubes. These tires feature a thicker puncture protection layer, offering enhanced resistance against flats. Please note that these tires may have a slightly higher rolling resistance, but when combined with electric assistance, the difference is negligible.

Other dropouts with 47mm Contact Plus Tyres

Additional €100,00

Sometimes there is a wish to fit thicker tires. This can be done with special longer dropouts. STAERK gives you the option of ordering 47mm thick Contact plus tires from the factory. Please note: these tires can have a little more friction but in combination with an electric support this is negligible.

Lowrider

Additional € 69,00

This Lowrider is ideal for carrying extra luggage. It has a maximum load capacity of 18 kg (9 kg on each side). With the fixed fork, it fits directly onto the fork. With the suspension fork, an additional bracket is used.

Side Stand

Additional € 12,00

The standard STÆRK tandem comes with a double kickstand at the front, providing stability even when folded. At times, having a side stand can be convenient for easily parking the tandem. However, it's important to note that when folding the tandem, you should still use the double stand. The option for a side stand is available only when there is no chain guard on the left side of the bike. Therefore, it's essential to carefully check the model of your STÆRK before selecting this option.

Extra lock for Bosch Battery

Additional € 129,-

The Bosch bicycles are popular. Unfortunately, thieves have discovered that individual batteries can also be sold. To further secure your battery, STAERK offers a stainless steel bracket with extra lock. This will discourage a would-be thief from trying to steal your battery.

MIK mounting plate for extra accu

Additional € 129,-

The MIK carrier (standard on STAERK tandems) can be equipped with an adapter plate to carry an extra battery. This immediately doubles your range. Simply switch the battery. Because it's a separate accessory, you don't always need to carry the extra battery. Only carry it when you think you'll need it.

Children set

Additional € 200,-

If a child wants to ride along on the tandem, they can do so from around 8 years old. STÆRK offers a kit for this purpose, allowing a small saddle to be mounted very low on the frame, along with crank shorteners. This allows the tandem to grow along with your child, and when your child is big enough, the original saddle can easily be reattached and the crank shorteners removed. So your tandem grows with your child.

Additional € 50,-

Foldable pedals

Sometimes it's conveniënt to be able to fold up the pedals as well. This makes the Tandem a bit narrower (at the bottom). This can be useful in a campervan or in tight storage spaces. STÆRK offers the option of having the front and rear pedals factory-replaced with folding pedals with excellent anti-slip properties.

Pump with clamp on frame

Additional € 12,-

It can be usefull to have a pump during the ride. STÆRK has a small pump that reaches the 6 Bar. Take note that it will take a while to pump to the max. pressure.

Mirror

Additional € 29,-

A mirror is more than just convenience. It provides a better overview and therefore provides a lot of added safety. The STÆRK mirror with aluminum clamp around the handlebars is fully adjustable, can be mounted on the left or right handside and has a sturdy housing, metal leg and is rotatable and foldable. This means that it does not get in the way when transporting or parking the tandem.

Spoiler

Additional € 12,-

In wet conditions, it's sometimes helpful to extend the front fender a bit to reduce splashing. STAERK offers this spoiler for this purpose.